Apparatus for dusting powdered substances on surfaces



v 1,643 143 Sept. 40,1927. P. w WILCOX APPARATUS FOR DUSTIf VG POWDERED SUBSTANCES ON SURFACES Filed March 6, 1925 2 Sheets-Sheet 2 Patented Sept. 20, 1927;

PHILIP w. WILCOX', or ATLANTA, GEORGIA; KATHARINE RAWLIThTG WILCOX' rrmxor'sarormnir w.-:wILooX, DECEASED EXECU- I APPARATII'S FOB DUS II G YQW BEDK SUIfi'rANCEson SUR A 1 Application flled' Mar ch 6, 923;' Serial No. 623,252. .v

Tliis ihvention" relatesto a method" and apparatusfor depositing or; dusting'powdered or pulverulent substances upon desired surfaces One adaptation? of the broad in-1 vention consists in depositing powdered io'il or flour upon the drums of bakers? molding or other machines, or uponfbaking pans and the like. Manifestl ithe invention not Iimitedfto these specific examplesof itseap plicability, but for thefpurpose of expressing the broadfiriventioin and also for the pur-' bseof pointingfl'out its peculiar adaptation and utility for'theib'aking art," it'will be disclosed in connection with such art.

[Up to the presn'ttim'e; considerable dif- J liculty' has been experienced in suitably applying fiour or'its' powdered equivalent to the dough receiving surfaces of baking ma chinerypa'ns, 'utensils,and thelike and particularly, to the rotating surfaces of the moldingmachine drums. The present practice iconsists in supporting over the molding. machi11e.drum,. achop per' containing flour. This hopper is providedwith a perforated bottom and a'n o'scillatory brush which brushesacro ss the perforations in the bottom, there- 'by' not only agitatingflour within the hopper but also forcing it out through the perforations. ,su ch an apparatus is defec i .d r t the: ss ngh sepe foratioiis s'otlia't it: is {necessary to stop the ii1acl1inefe veryso often and clean the dischargeperforations in the bottom of the hopper in order to makeit function properly; secondly, because. the oscillatory orintermitt'ent motion applied to the-brushdoes not.produce a uniform :Eeed but rather,vga waveelikeblaiiket of flour on the drum 'bee neath producing Ksubstantially bare spots and areas onwhlchan excessiveamount of greasing substance is deposited; If the dough s or, utensil be insuflioiently provided with greasing substance the bread sticks; on.

' the other hand, excessive greasing produces black or burnedvspots on the baked'dough' II The present invention has for itstJobject' the 'uniforrn and, thorough distribution of the powdered substance .uponthe .entirevsur- I H I I I I I I i i which longitudinallyofthe travel of the face to be treatedi providing a method and: apparatus [for atomizing the powdered substance and its projection in the formpof-a sprayjorv fog upon the surface to be treated, which is particularly' efi'ective fin producing" a uniform and through distribution of the QPOWdQI'BiCl:

substance.

'i s iu'andther icbject of this" inventionfre side's; in' i'providing I a. devicejwhich positively regulates thelquaritity of powdered substance which is dep'os1te'duponjlhe desired surface.

i'lfhe and other objects will b' pparent;

from a perils al of th'effollo'wing specification wheiij talien connection with the accome panying drawings, wherein+C su e 1.15 a side; elevation f he fi v i fFigQZ 'sa se tional view on the l'iiie ofiFigJliandj Fig. is a section on. the line 3-93 of 1'In" "tl 1e"presenbliIistance, the powdered greasing material ,is'illustrated as being dis? tributed upon the drum of a bakers molding machine Ihis drumis-provided on its periphery with spacedflanges so that the cross section "issub'stanti'allyl a, square i U shape. o. The molded Irolls of dough are carried, on the peripheryofthe drum between these flanges." I I I Referringnow t the 'detailsofthe,-draw- IshoW gionef construction embodymg the invention}asfapplied to the drum; a lowercaflng 1 i provided at its upper-porni n wi h anfiutwardly extending flange 2 adapted to fformfa 'seat fonaflange 3 of the upwardlyIlextending hopper 4, the hopper. {being secured to asing 1 by suitable bolts 5"passingthroughtheflanges 3 and 2. Pref erablyithe hopperAegis open at its top and bottom, although itis obvious that a suit: able cover maj' be used for the top of the hoppemifdesiredg I r I 7 ans: is: providedgfor not only closing theopen bottom or the hopper 4, but for also removing quantities ;0f the powdered substance in the ho ppen ,In the present form, this ineans'consis ts of a traveling member iiitlieifor'm of an e ndless belt 6 ofleather'or sheet :metal; which extends: entirely across the bottombf thehopper, as shown clearly in. Iii'guiesBand 3. If desired, the bottom ofthe hopper maybe provided with a downwardlyeXteIidingcollar 7 to the sidesiof belt, aiievwelded or otherwise. fixed two chan-. fiel-iron safi iand'=9,,h horizontal-'flangeof which channel members provide 7 inwardly projecting flanges which. confine, the discharge of thepowdered substance from the lit) hopper to the inner portions of the traveling belt 6. Thisprovidesa veryvsiniple means for preventing leakage of the powdered sub stance along the longitudinal edges of the traveling belt v t In order to regulate to, a nicety theamount; of powdered substance which is carried away by this belt- 6; as thebelt-passesout through the side of the hopper, the latter is provided with an adjustable gate 10. This gate is preferably located at the point of L emergence of the beltl'roin the hopper andis adjustable toward andlrom the surface of the belt whereby the thickness of the layer of powdered suhstance inthe belt may be, regulated.

A simple and convenient -f0111l0f adjusting.

means comprises the rod 11 lixedby any suitable means to the gate 10. Thisrod 111 ismounted in a bracket 12carried on the side of the hopper a, and "at its upper end 'is provided'witli an adjusting whee113, and an intermediateinut 14; between which and the underside ofthe bracket is coiledaspring 15 which operates to continually press-the gate downwardly to the adjusted distance.

substanceto be treated in the f rn-r f i spray, mist or fog, so;tl1at the fine particles ofsubstance will fioatiii the *airztoward and will settle upon" all portions of i the desired surface. This actioniis particularly"necess sary because' it i is iinperativvthat thesides ofthe pans or flangesof the inolding na chine drum be=covered witli'the greasing sube stance=to prevent sticking: Inprior devices, this hasnot been possible; Thedesired em= bodiment of this meansconiprisesa rotating brush 23; the preferably non-inetallic bristies offivliich are co-extensive with the trav-' cling belt 6. This brushis mounted upon a slia'ft-24 which in'turn is mounted in a bearing 25 projecting through slots 26 [in the bearing-plate 20., Adjusting screwsQTare arranged at each end of Itlie' shaft 24 and are threaded at their upper ends into the bearings25 and. attheir lower ends into .a flange 28 4 at the base of the bearing plate 20. Suitable adjusting nuts29 are provided for adjusting the shaft 24lgthe desiredamount to and irom the rolle1x17 about which? the traveling bcltpasses. By" means offthis .arrangement; the brush23- rotatesinto' contact with the traveling belt and preferablyin the opposite direction thereto so that the powbottonrot the casing toward thesuriace to he powdcredoin dusted. This abutmentiSO is of any desirediorm, and is preferably carriedby an adjustable bracket ill held in desired adjustment hyithe nut 32. Preferablv a shield33is provided'for positively directing the powder againstflthe brush bris;

tics so that the powder cannotescape or pass the abutment as is clearly shown iitllig. 3. In addition, swii'iginggloors 47"and 4-8 are provided which depend into the p eriphelry of the druinD between the flanges shown in dotted lines. 'Ihese doors a re hingedpreierably to the lower portion of the casing 1 by means of ears 1-9and50sons'toentirely close in thatxzone of the drum periphery-be The swinging neath the rotating brush. doors permit the dougl'i form to passinto and out ofthe compartment, and at thesame time preventsthe escape of and secures the localization offthe tog orniist of powdered substance atthe drum; periphery. The'outer' ends of the brush shaft 24 are likewise providedwith a sprocketgear 34' about which;

passes asprocketchain This chain also passes over the sprocliet wheel 22 and l over a third sprocket wheel 36 mounted on ashaft 37 carried by asupport 38 'ateaclr end of the casing: The shaffi 37 in addition, carries a larger sprocket 40 around which passes a.

driven chain'- 41 driven from any suitable source of-power. 16"is-anounted in abearing 42 slidablein ways 153 of plate 44 mounted on the side of casing li This bearing- 42 B maintained in anoutward position by ineans-ofa coiled spring lawhich isicon'fined between bearing i and a flange 46 on thep late (14. By this means a suitable tension is given to the traveling belt.-

In the; operation of'this device, the pow-i dered oil, flour or. other substance is fed into thehopper and the driving fchain operatedf Tl'ierbelt will then travel across the open bot: tom ofithe hopper 4 and willcarry with it the coating oi the powderedmaterial which will betransferred to the brush 23eitherby dropping "thereon or by contacting with the brush. As the'bristles rotate, they will vcome in contact with the rigid abutment 30 and will thereupon atoinize an? u-oject the pow dered oil toward the rotatingdrum of the -molding machine in the form of a fog.

' metallic shield 33 imparts to these bristles a Careful observation and experiments have shown that the rotation of the brush bristles against the traveling belt 6 or against the so that as the drum rotates and is fed with dough forms the latter are effectively coated with the powdered substance.

It is obvious that instead of dusting the powder upon the rotating drum, the method and apparatus may be equally used for dusting bread pans or other desired objects.

, Byv the use of this device, it willbe apparent that there can be no clogging of the powdered substance in the hopper 4; that by means of the adjustable gate 10, just the correct amount of powdered substance will be fed to' the rotating'brush and that the substance so fed will be evenly and effectively distributed upon the surface to be dusted.

By means of the above described method of impacting or forcibly projecting particu larly powdered oil against the surface to be dusted, a more effective oiling is obtained. This method is noticeably advantageous in the dusting of bread pans and the like. The

It] projection of the oil particles produces a more lasting effect than is the case when the same is applied by merely dropping it on with the former machines. With the new process the powder effectively adheres to spots to which it will not stick when using former apparatus. Moreover, the distribution is much more uniform.

It is obvious that minor changes in the details of construction and the arrangement of the parts may be made without departing from thespirit ofthe invention as set forth in the appended claim.

- Having thus described the invention, what I claim as new and desire to secure by Letters- Patent, is-- A device of the class described comprising a hopper having a discharge outlet, a traveling endless belt disposed across said outlet for normally closing the outlet, means for moving said endless belt whereby a layer of the material in the hopper is carried from the hopper by said belt, means on said hopper and spaced from said belt for determining the thickness of the layer on said belt, a rotatablebrush associated with said endlessbel't and disposed so as to remove the layer of materialfrom said belt, and means for causing the bristles of the brush to flick the material taken fromthe belt against a desired surface beneath said brush, said means for causing the bristles to flick the material including an adjustable bracket 1y ing in the path of movement of said bristles. In testimony whereof, I aflix my signature.

PHILIP W. WILCOX.. 

